is a Japanese former singer, television presenter, and bassist for the Johnny & Associates group Tokio.
He has acted in several movies and television shows as well as being a co-star for Tokio's variety shows Tokio Kakeru and The Tetsuwan Dash.
On 25 April 2018, news broke that Yamaguchi had been referred to prosecutors for allegedly kissing a girl against her will at his home in Minato, Tokyo, in February 2018. At a hastily arranged news conference at a hotel in Tokyo on 26 April, Yamaguchi apologized for kissing and engaging in indecent behavior with a high school-aged girl. A lawyer representing Johnny & Associates, the talent agency that manages Tokio, announced that Yamaguchi would be indefinitely suspended from activities.
On 6 May 2018, Johnny & Associates announced that they had terminated their contract with Yamaguchi.
Yamaguchi married a former model in March 2008. On 5 August 2016, he announced that they had divorced.
On September 22, 2020, he was arrested on suspicion of drunk driving after rear ending a car in front of his motorcycle.
Film
Television